Minerale? technology in a warm brushed thermal fabric will keep you warm and dry in this wintertime baselayer. * UPF 30+ Sun Protection * P.R.O. Thermal Fleece fabric with Minerale? provides optimal insulation, moisture transfer, dry time and odor?resistance * China * 100% polyester (55% polyester 45% Minerale? polyester); Use simple detergents with no additives; Never use detergents with fabric softeners, perfumes or any additive type product; The general rule of thumb is the simpler the better.; Many detergents with additives leave "surfactants" behind on a fabric"s fibers that inhibit the technical performance; Typically the best detergents to use will have "Clear" or "Free" in their names; Don"t pour the detergent directly onto the clothing, put it in the washer first, when you start the water; If something is not functionally working, but is not dirty, try rinsing it twice in warm to hot water; This will help get rid of the harmful surfactants. Read the care content label; On the inside of your garment, or on the hangcard, there are instructions for the care of that individual piece; On garments this will be on a side seam or back seam label. Follow those directions; On finer fabrics, use a "Gentle" cycle. Close all zippers, attach "hook and loop" closures on gloves You can use the dryer, carefully; If you use a dryer be sure to use a lower / warm heat setting (Do NOT use a commercial dryer or a "Hot" setting); This will often restore the fabric and help the water and wind repellent qualities; If in doubt, hang the clothing to dry.